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我目前正在尝试div使用Windows.UI.Input.GestureRecognizer该类检测交叉滑动手势。

我已经能够成功实现对这个手势的检测,除非元素处于可滚动区域中。

具体来说,当它位于可滚动区域时,我MSPointerCancel几乎会在事件发生后立即收到一个MSPointerDown事件——如果我缓慢移动触摸交互,我确实会看到一些 MSPointerMove事件,但随后它会关闭并取消它。

深入研究WinJS.UI.ListView实现,我几乎在做同样的事情。这种行为确实有效,所以我不认为这是驱动程序或模拟器的问题。

要查看此代码交叉滑动,请按如下方式更改 CSS:

.container:width: 3000px改为width: 300px

示例代码

可以通过在 Visual Studio 中创建一个空白 JavaScript 应用程序并将代码粘贴到下面讨论的位置来测试此代码。

JavaScript,Default.js 的结尾

WinJS.Namespace.define("Sample", {
    Swiper: WinJS.Class.define(function (el, options) {
        this.element = el;
        WinJS.UI.setOptions(options);
        this.mouseUp = this.mouseUp.bind(this);
        this.keyPress = this.keyPress.bind(this);

        //el.addEventListener("mouseup", this.mouseUp, true);
        el.addEventListener("keypress", this.keyPress);

        // Gesture events
        this.pointerDown = this.pointerDown.bind(this);
        this.pointerMove = this.pointerMove.bind(this);
        this.pointerUp = this.pointerUp.bind(this);
        this.pointerCancel = this.pointerCancel.bind(this);

        el.addEventListener("MSPointerDown", this.pointerDown, true);
        el.addEventListener("MSPointerMove", this.pointerMove, true);
        el.addEventListener("MSPointerUp", this.pointerUp, true);
        el.addEventListener("MSPointerCancel", this.pointerCancel, true);
    }, {
        element: null,
        _recognizer: null,
        wasSelected: false,
        currentTarget: null,
        pointer: null,
        mouseUp: function (e) {
            if(!e) {
                return;
            }

            if(e.button !== Sample.Swiper.RIGHT_MOUSE) {
                return;
            }

            if (!WinJS.Utilities.hasClass(e.srcElement, "swipeable")) {
                return;
            }

            this._toggleSelection(e.srcElement);
        },
        keyPress: function (e) {
            if (!e) {
                return;
            }

            if (e.keyCode !== WinJS.Utilities.Key.space) {
                return;
            }

            if (!WinJS.Utilities.hasClass(e.srcElement, "swipeable")) {
                return;
            }

            this._toggleSelection(e.srcElement);
        },
        pointerDown: function (e) {
            console.log("Pointer: Down");
            if (!WinJS.Utilities.hasClass(e.srcElement, "swipeable")) {
                return;
            }

            var p = Windows.UI.Input.PointerPoint.getCurrentPoint(e.pointerId);
            var touch = (e.pointerType === Sample.Swiper.TOUCH);
            var pointerProperties = p.properties;
            this.pointer = e.pointerId;
            if (!touch) {
                this.mouseUp(e);
                return;
            }

            this.currentTarget = e.srcElement;
            window.proxy.msSetPointerCapture(p.pointerId);
            this._getRecognizer().processDownEvent(p);

            //e.stopImmediatePropagation();
            e.preventDefault();
        },
        pointerMove: function (e) {
            if (e.pointerId !== this.pointer) {
                return;
            }
            console.log("Pointer: Move");
            var ips = Windows.UI.Input.PointerPoint.getIntermediatePoints(e.pointerId);
            this._getRecognizer().processMoveEvents(ips);
            //e.stopImmediatePropagation();
        },
        pointerUp: function (e) {
            if (e.pointerId !== this.pointer) {
                return;
            }
            console.log("Pointer: Up");
            var p = Windows.UI.Input.PointerPoint.getCurrentPoint(e.pointerId);
            this._getRecognizer().processUpEvent(p);
            //e.stopImmediatePropagation();
        },
        pointerCancel: function (e) {
            if (e.pointerId !== this.pointer) {
                return;
            }

            console.log("Pointer: Canceled");
            this._getRecognizer().completeGesture();
            e.stopImmediatePropagation();
        },

        _toggleSelection: function (el) {
            WinJS.Utilities.toggleClass(el, "selected");
        },
        _getRecognizer: function () {
            if (this._recognizer) {
                return this._recognizer;
            }

            var gr = new Windows.UI.Input.GestureRecognizer();
            gr.showGestureFeedback = false;
            var thresholds = gr.crossSlideThresholds;
            thresholds.selectionStart = WinJS.UI._VERTICAL_SWIPE_SELECTION_THRESHOLD;
            thresholds.speedBumpStart = WinJS.UI._VERTICAL_SWIPE_SPEED_BUMP_START;
            thresholds.speedBumpEnd = WinJS.UI._VERTICAL_SWIPE_SPEED_BUMP_END;
            thresholds.rearrangeStart = null;

            gr.crossSlideThresholds = thresholds;
            gr.crossSlideHorizontally = false;
            var settings = Windows.UI.Input.GestureSettings;
            gr.gestureSettings = settings.crossSlide;
            gr.addEventListener("crosssliding", function (e) {
                var el = this.currentTarget || document.createElement("div");
                console.log("CrossSlide State: " + e.crossSlidingState);
                switch (e.crossSlidingState) {
                    case Windows.UI.Input.CrossSlidingState.selecting:
                        this.wasSelected = true;
                        break;

                    case Windows.UI.Input.CrossSlidingState.completed:
                        if (this.wasSelected) {
                            this._toggleSelection(this.currentTarget);
                        }
                        this.wasSelected = false;
                        this.currentTarget = false;
                        break;

                    default:
                        this.wasSelected = false;
                        break;
                }
            }.bind(this));
            gr.addEventListener("manipulationstarted", function (e) {
                debugger;
            });
            this._recognizer = gr;

            return gr;
        }
    }, {
        RIGHT_MOUSE: 2,
        TOUCH: 2,
    }),
});

HTML,替换 default.html 中的正文

<body>
    <div class="scroller" data-win-control="Sample.Swiper">
        <div id="proxy"></div>
        <div class="container">
            <div class="item swipeable"
                tabindex="0">
            </div>
        </div>
    </div>
</body>

CSS,添加到 default.css

.scroller {
    width: 100vw;
    height: 100vh;
    overflow-x: auto;
    -ms-touch-action: auto;
}
.container {
    width: 3000px;
    height: 100vh;
    display: -ms-grid;
    -ms-grid-columns: 1fr 100px 1fr;
    -ms-grid-rows: 1fr 100px 1fr;
}

.item {
    background-color: red;
    -ms-grid-column: 2;
    -ms-grid-row: 2;
}

.selected {
    outline-color: white;
    outline-style: solid;
    outline-width: 3px;
}
4

1 回答 1

1

这是因为-ms-touch-action需要在特定的平移轴上“固定”以进行直接操作。因此,如果您想要垂直横向滑动(例如滑动手指),那么您需要确保要检测横向滑动的元素已-ms-touch-action设置为pan-x,以启用水平平移,而不是垂直平移。滚动条应该-ms-touch-action设置为auto

(这将教会我查看 VS 中的智能感知,而不是查看文档;我知道这里有一些东西)

于 2013-01-07T20:03:07.307 回答